#define MAX_ROW 3
#define MAX_COL 3

//1. 棋盤初始化
void init(char chessBoard[MAX_ROW][MAX_COL]) {
 for (int row = 0; row < MAX_ROW; row++) {
  for (int col = 0; col < MAX_COL; col++) {
   //將這個(gè)棋盤（二維數(shù)組）每個(gè)位置都初始化為空
   chessBoard[row][col] = '   ';
  }
 }
}

//2. 打印棋盤
void printChessBoard(char chessBoard[MAX_ROW][MAX_COL]) {
 printf("+---+---+---+\n");
 for(int row = 0; row < MAX_ROW; row++) {
  printf("|");
  for (int col = 0; col < MAX_COL; col++) {
   printf(" %c |", chessBoard[row][col]);
  }
  printf("\n+---+---+---+\n");
 }
}

//3. 玩家落子
void playMove(char chessBoard[MAX_ROW][MAX_COL]) {
 while (1) {
  int row = 0, col = 0;
  printf("請(qǐng)玩家通過(guò)輸入坐標(biāo)落子：");
  scanf("%d %d", &row, &col);
      //檢驗(yàn)玩家是否輸入錯(cuò)誤
   if (row < 0 || col < 0 || row >= MAX_ROW || col >= MAX_COL) {
    printf("輸入錯(cuò)誤！請(qǐng)重新輸入");
    continue;
   }
         // 檢驗(yàn)玩家輸入的位置 是否已經(jīng)有子(判斷位置是否為空，不為空即有子)
   else if (chessBoard[row][col] != ' ') {
    printf("該位置已經(jīng)有子，請(qǐng)重新輸入");
    continue;
   }
   else {
    //沒(méi)問(wèn)題，落子，標(biāo)記為'x'，并退出當(dāng)前循環(huán)
    chessBoard[row][col] = 'x';
    break;
   }
 }
}

//4. 判定勝負(fù)情況，檢查棋盤的所有位置，是否符合勝利的4種情況
//玩家獲勝，返回x; 電腦獲勝，返回o; 和棋返回p; 
char chessWin(char chessBoard[MAX_ROW][MAX_COL]) {
 //判斷橫著的3個(gè)位置
 for (int row = 0; row < MAX_ROW; row++) {
  if (chessBoard[row][0] != ' ' && chessBoard[row][0] == chessBoard[row][1] && chessBoard[row][0] == chessBoard[row][2]) {
   return chessBoard[row][0];
  }
 }
 //判斷豎著的3個(gè)位置
 for (int col = 0; col < MAX_COL; col++) {
  if(chessBoard[0][col] != ' ' && chessBoard[0][col] == chessBoard[1][col] && chessBoard[0][col] == chessBoard[2][col] ){
   return chessBoard[0][col];
  }
 }
 //判斷2，4象限對(duì)角線的3個(gè)位置
 if (chessBoard[0][0] != ' ' && chessBoard[0][0] == chessBoard[1][1] && chessBoard[0][0] == chessBoard[2][2]) {
  return chessBoard[0][0];
 }
 //判斷1，3象限對(duì)角線的3個(gè)位置
 if (chessBoard[2][0] != ' ' && chessBoard[2][0] == chessBoard[1][1] && chessBoard[2][0] == chessBoard[0][2]) {
  return chessBoard[2][0];
 }
 if (isFull(chessBoard)) {
  return 'p';
 }
 return ' ';
}

//4.3 判斷是否和棋（棋盤滿了，但未分勝負(fù)）,返回1表示棋盤滿了，返回0表示棋盤未滿
int isFull(char chessBoard[MAX_ROW][MAX_COL]) {
 for (int row = 0; row < MAX_ROW; row++) {
  for (int col = 0; col < MAX_COL; col++) {
   if (chessBoard[row][col] == ' ') {
    return 0;
   }
  }
 }
 return 1;
}

//5. 電腦落子（隨機(jī)）
void computerPlayMove(char chessBoard[MAX_ROW][MAX_COL]) {
 while (1) {
  //控制落子的坐標(biāo) x,y 在[0,2]之間
  int row = rand() % MAX_ROW;
  int col = rand() % MAX_COL;
  //判斷電腦想落子的位置是否為空（即是否已經(jīng)有子），如若已經(jīng)有子，繼續(xù)循環(huán)
  if (chessBoard[row][col] != ' ') {
   continue;
  }
  //如果電腦想落子的位置為空，則將 ‘o' 賦給該位置，并結(jié)束循環(huán)
  chessBoard[row][col] = 'o';
  break;
 }
}

int main() {
 char chessBoard[MAX_ROW][MAX_COL];
 char winner = ' ';
 //1. 棋盤初始化
 init(chessBoard);

 while (1) {
  //2. 打印棋盤，令玩家觀察此時(shí)棋盤的狀態(tài)
  printChessBoard(chessBoard);
  //3. 玩家落子
  playMove(chessBoard);
  //4. 判斷勝負(fù)情況
  winner = chessWin(chessBoard);
  if (winner != ' ') {
   //已經(jīng)有非空返回值，游戲結(jié)束
   break;
  }
  //5. 電腦落子
  computerPlayMove(chessBoard);
  //4. 判斷勝負(fù)情況
  winner = chessWin(chessBoard);
  if (winner != ' ') {
   //已經(jīng)有非空返回值，游戲結(jié)束
   break;
  }
 }
 if (winner == 'x') {
  printChessBoard(chessBoard);
  printf("恭喜玩家獲勝！");
 }
 else if (winner == 'o') {
  printChessBoard(chessBoard);
  printf("惜敗，電腦獲勝了哦~");
 }
 else {
  printChessBoard(chessBoard);
  printf("哎呀，你和電腦打成平手了呢~");
 }

 system("pause");
 return 0;
}